Add history section for atmconfig(8)

PR:		212415
Approved by:	bcr (mentor)
MFC after:	5 days
Differential Revision:	https://reviews.freebsd.org/D8104

sbin/atm/atmconfig/atmconfig.8

@@ -1,7 +1,7 @@
 .\"
 .\" Copyright (c) 2001-2003
 .\"	Fraunhofer Institute for Open Communication Systems (FhG Fokus).
-.\" 	All rights reserved.
+.\"	All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
 .\" modification, are permitted provided that the following conditions
@@ -28,7 +28,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 11, 2003
+.Dd October 5, 2016
 .Dt ATMCONFIG 8
 .Os
 .Sh NAME
@@ -314,5 +314,10 @@ List all NATM routes.
 .Sh SEE ALSO
 .Xr natm 4 ,
 .Xr natmip 4
+.Sh HISTORY
+An
+.Nm
+command appeared in
+.Fx 3.0 .
 .Sh AUTHORS
 .An Hartmut Brandt Aq Mt harti@FreeBSD.org